Aeroplane or craft for aerial navigation.



N0- 846,830. PATEN'I'ED MAR. 12, 1907. Q

A. & H. DUPAUX. AEROPLANE 0R CRAFT FOR AERIAL NAVIGATION.

APPLICATION FILED FEB.25, 1905.

4 SHEBTBSHEET l.

I Fig.1.

E} WMjg? WA @Ma' ii mm A is 1 WW No. 846,880. PATENTED MAR. 12, 1907. A. & H. DUFAUX. ABROPLANE 0R CRAFT FOR AERIAL NAVIGATION.

APPLICATION FILED FEB.25,1905.

4 SHEETS-SHEET 2.

No. 846,830. PATENTED MAPwlZ, 1907. A. & H. DUFAUX.

AEROPLANE 0R CRAFT FOR AERIAL NAVIGATION.

APPLIUATION FILED FEB.25, 1905.

4 SHEETS-SHEET 8.

No. 846,830. PATENTBD MAR. 12, 1907.

A. & H. DUFAUX. V AEROPLANE OR CRAFT FOR AERIAL NAVIGATION' APPLICATION FILED I'EB.25, 1905.

4 SHEETS-SHEET 4.

UNITED STATES PATENT AEROPLANE- OR CRAFT FOFLAERIAL. NAVIGATION.

Specification of Letters Patent.

Patented March 12, 1907.

Application filed February 25, 1905. Serial No. 247.365.

To all whom it may concern.-

Be it known that we, ARMAND- DUFAUX and HENRI DUFAUX, both constructors, residing at Geneva, Switzerland, have invented certain new and useful Improvements in and Relating to Aeroplanes or Crafts for Aerial Navigation, of which'the following is a specification. a

Our invention relates to improvements in mechanism used in aerial navigation; and an object of our invention is to provide a highlyefficient machine of this type susceptible of being easily-directed and controlled.

In the drawings, illustrating the principle of our invention and the best mode now known to us of applying that principle, Figure 1 is a plan view of our new aeroplane; Fig. 2 is an elevation of the same partly in sectional view. Fig; 3 is a sectional view on line y 2, Fi 2-. Fig. 4 is a sectional view on line a w, ig. 2.' Figs. 5, 6, and 7 are diagrams showing parallelograms of forces un' der different conditions hereinafter exlained. Figs. 8, 8 9, I and 9 illustratemodifi'cations hereinafter referred to; and Figs. 10 and 11 show modified forms of wings.

The drumD is encircled bya cylindrical casing Gfibetween which and the drum D are interposed antifriction-balls c, whicheserve to make the casing C freely rotatable around the drum D. Mounted in bearings in the side walls (1 d of the drum D is a shaft e,

walls cl (ll of the drum D are secured braces D, which serve. to support the propellers F and G, which may be any suitable type. 1

The propeller F is driven by the gsar f, fast upon the shaft 6, and connected,-t 'ough the inions f f and the shaft 1, with the gear 1", fast upon the shaft ofthe propeller F.. "In an entirely similar way the propeller G is driven from the shaft 6' the gears g 9', pinionsg y, and shaftg. See Fig. 4.)

fefiect of air-currents the wings A andB made to take the position'shown' in Fig. 6

To the casing-C are attached arms art, of unequal length, each of which carries at its free end a wing, (marked Aand B, respectively.) Each wing is made up of the planes a 6 and c which form a frame of double- T section. In the preferred form (shown in Figs. 1, 2, and 3) the wings are-of equal area or surface; but, as shown in Figs. 8, 8, 9, and 9, the wings may be of unequal area. Furthermore, the wings may be of the form shown in Fig. 10 or of that shown in F ig. 1.1. Again, while in forms shown in Figs. 1,2, 9, and Q -the arms a and b are of une ual length theyv may be of equal length,'as s iown at a b, when the area of one wing, as of B, exceeds the area of the other or of A. (See Figs. 8 8

In Figs. 1, 2, and 4 the center of gravity'of the motor E is shown vertically beneath the shaft e, and the shafts of the propellers F G are shown as vertical; but the angular position of the propeller-shafts may be inclined to the vertical by disengaging the arm e from the side wall 01 of the drum D and rotating the latter.

Referring now to Fig. 5,;the position of the arms wand b are vertical, no lateral currents prevailing. The wing B lies below the wing A, since the arm I) is longer than the arm of.

By rotating the drum D let the shafts of the propellers F and G be so inclined td the vertical that by their rotation they exert upon the apparatus a force the magnitude and di rection of which are represented by the length and direction, respectively, of the line X in Fig. 6, while the line Y by its length and direction represents the weight of the apparatus. The resultant of these two forcesX and Y is 2. In this we have not taken into account the effect of the air-pressure upon the wings A B. Supposenow that by the are and that the upward pressure of the air upon the wings is represented by Y, theresultant of the forces Y and Z is 2, Fig. 6.

In Fig. 7 the position of-the wings is that due to an air-pressure, the lifting effect 'of which is represented by the line, P, equal and opposite to the line Y,.which re resents the weight of the apparatus; 'Un er this assumed condition-and the further condition that the shafts of the propellers F and G are assumed tojbe horizontal the full efi'ort of the v I we 846,839,

propellers F and G is realized in driving the 'ried by said drum and. driven by said shaft;

ap eratus in the lateral direction of the rea-casing outside of said drum andfree'to r0 7 s tent z of Fig. 7; tatethereon; and Wings carg'ied by said-cas- 15 :What We cleimis- 'I in? P v v ;5' "In a mechanism of the character described," n testimony whereof we'have signed our a. drum; a, shaft rotatably mounted-l therein; names t 'this specification in the presence of a..mot01'- mountedin said drum, for driving twosubscribing witnesses.

said shaft, said motor being freeto swing I ARMAND DUFAUX. "a'g'mund said shaft'after the manner Of a en- -HEN'RI DUFAUX.

.I 9 dulum; an arm for swinging said motor a out Witnesses:

'sa.id.shaf-t; n 1eans forseeuri'ng sa'id'arm in ad: .E. MERTEL'MENE; v usfid pos t ontosmd drum; .prepelle 's car- 1 f HORACE LEE' WASHINGTON, 

